Chapter 5.4, Problem 41E

To determine

To calculate: The minimize: $c=x+1.1y+1.3z$

With subject to:

$\begin{array}{c}2y+2.5z\ge 70\\ \text{ 2}\text{.5}x\text{+3}y+z\ge 50\\ \text{7}x\text{+6}y\ge 60\\ x\ge 0,y\ge 0,z\ge 0\end{array}$